Frederik IX and Queen Ingrid were the Danish royal couple from 1947 until 1972, when King Frederik died and was succeeded by his eldest daughter, Queen Margrethe II. In contrast to his predecessors, Frederik IX was seen as a man of the people, and thanks to the influence of Queen Ingrid he endowed his reign with kingly dignity. Together they modernized the Danish monarchy and came to symbolize an exemplary modern Danish nuclear family. They mastered the art of being both popular and royal in a time in which handling of the media became increasingly important for the monarchy.

Christian IX and Queen Louise were the first couple of the Glucksburg line on the Danish throne. They had a difficult beginning, as they ascended the throne in 1863, immediately prior to the military defeat by Prussia and Austria in 1864. However, they eventually became popular with the Danish people, not least because they secured such advantageous marriages for their six children that already in their own day they were known as "Europe's parents-in-law". Today there are not many European royals who are not descendants of Christian IX and Queen Louise, who died in 1906 and 1898 respectively. This book is part of the Crown Series, a series of small books on the Danish monarchy and related subjects published in cooperation with the Royal Danish Collection.